# test case 1
./Grades 39 90
# expected Fail
# observed Pass

# test case 2
./Grades 90 30
# expected Fail
# observed Pass

# test case 3
./Grades 5 80
# expected Fail
# observed Pass

# test case 4
./Grades 30 -60
# expected Invalid Input
# observed Fail

# test case 5
./Grades 1 100
# expected Fail
# observed Pass

# test case 6
./Grades 100 100
# expected Pass with distinction
# observed no output
